1. Faculty of Dentistry of Piracicaba, State University of Campinas, Piracicaba, SP, Brazil;
2. Oral Health Research Institute, Indiana University School of Dentistry, 415 N. Lansing Street, Indianapolis, IN 46202-2876, USA; and
3. Faculty of Dentistry of Ribeirão Preto, State University of São Paulo, Ribeirão Preto, SP, Brazil